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About this tool
Washington destination-based sales tax: 6.5% state rate plus your local rate, trade-in credit and the 0.3% vehicle tax.
This calculator works out Washington retail sales tax by adding the 6.5% state rate under RCW 82.08.020 to the local city, county and transit rate that applies where the buyer takes delivery, which is the destination-based sourcing rule in RCW 82.32.730. It handles taxable shipping, a like-kind trade-in deduction and the extra 0.3% state tax on motor vehicle sales, and it can back the tax out of a price that already includes it. Sellers, online merchants shipping into Washington and buyers checking a quote all get the same state, local and total split.
Open US Sales Tax Calculator Washington on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Separates the 6.5% state share from the local share so filing by location code is straightforward.
Uses the buyer's delivery location rate, which is how Washington sources retail sales.
Deducts a like-kind trade-in and lets you mark shipping taxable or not before the tax is computed.
The state portion is 6.5%, and local jurisdictions add their own rate on top, so the combined rate typically lands between about 7.0% and 10.6% depending on the address. Seattle sits near the top of that range and some unincorporated areas near the bottom.
The customer's. Washington is a destination-based state under RCW 82.32.730, so retail sales are sourced to the place where the buyer receives the goods — the delivery address for shipped orders, or the store counter for over-the-counter sales.
Yes, when the goods being shipped are taxable. Delivery, shipping and handling charges are part of the selling price under RCW 82.08.010(1), so tax applies to them at the same rate; if the goods are exempt, the related delivery charge is not taxed.
Retail sales and leases of motor vehicles carry an additional 0.3% state tax under RCW 82.08.020(3) on top of the 6.5% state rate and the local rate, and buyers in the Sound Transit district also pay a separate regional transit authority motor vehicle excise tax at registration. Confirm the total with a licensing office or a tax professional.
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